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physics concept 8 L.O 1 Flashcards | StudBud
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physics concept 8 L.O 1
physics concept 8 L.O 1
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1
Who is the best physics teacher ?
The answer is A
The answer is C
Mrs.Marwa
The answer is B
2
Do you like our questions ?
yes
of course
Yep
sure
3
Why is dimensional analysis necessary?
To find dimensional constants
To check physical correctness
To derive a mathematical expression or check its correctness
[M], [L] and [T]
4
If A= BC and dimension of A are M
2
L T
-2
and B = M L
4
T
-2
then dimension of C is:
M.L3 .T2
M L-3 T 0
M.L3 .T
M3.L.T
5
The dimension of mass, length and time are represented as......
respectively.
[T] , [L] , [M]
[L] , [T] and [M]
[M], [L] and [T]
6
Dimensional analysis does NOT provide information about
Physical laws
Dimensional constants
Units of measurement
Mathematical equations
7
Which of the following is a correct statement about dimensional analysis?
Quantities can be added/subtracted only if they have the same dimensions
Dimensions must always differ in equations
Quantities can be added regardless of dimensions
Dimensions are irrelevant in physics
8
Which of the following physical quantities has the same dimension as E
nergy
?
work
force
Velocity
Power
9
Dimensional analysis of this law : kinetic energy = 1/2 mass x square velocity
M.L2 .T -2
None of the answers
M.L-2 .T -2
M.L2 .T 2
10
Dimensional equations is obtained by equating dimensional formula on R.H.S and L.H.S
TRUE
FALSE
11
Are you ready for the next question ? it's the big boss
of course
sure
yes
NO
12
Dimensional formula of velocity
V = 1/2 M.V2
V = D-1.T
V = D.T-1
